I bought and set up a Linksys WRT54G2 router and cant get online.

To connect to your wireless router, the router's wirelesssettings needs to be configured with the SSID, encryption etc. and also thewireless cards in all the laptops/computers needs to be configured with theserouter's wireless settings. Then the laptops/desktop computers can communicatewith your wireless router.
Connect a LAN cable from the Linksys to the LAN port on your computer.
Open a browser and enter the Linksys configuration URL
http://192.168.1.1
The default login = admin
The default PW = admin
You can protect your router by changing the default admin PW (write it down andput it in a safe place)
Go to the wireless configuration and set up the SSID and WPA or WPA2encryption.
Apply these settings to the wireless card in your laptop/computer.
To secure your wireless network from unauthorized access, please click on thislink and follow my instructions :-http://www.fixya.com/support/r3559128-wireless_router_security

Most Cable Internet Service Providers (ISPs) use Media Access Control (MAC) Address authentication to establish Internet connection for end-users. MAC address is a unique identifier assigned to the network adapter/s of the computer.
To set up your Linksys router to work with a Cable ISP, you have to enable the MAC Clone feature of the router. MAC Cloning is a procedure which enables a router to copy the MAC address of the computer registered with the ISP.
To set up a Linksys router with Cable connection, you need to perform four steps using the computer that's been registered with the ISP:
i. Verifying Internet Connection
ii. Connecting the Devices Together
iii. Checking the Router's LEDs
iv. Setting Up a Linksys Router for Cable Internet Connection

Verifying Internet Connection
Connect the computer to the Broadband modem using an Ethernet cable without the router installed. If you cannot get online, contact your ISP. If it's online, use the computer to set up the router.
NOTE: Some cable modems use the USB port. If the physical connection is via USB port, you may not be able to go online via Ethernet connection. Contact your ISP to have the Ethernet port of the modem configured.

NOTE: The image may vary depending on the computer and modem you're using.
Connecting the Devices Together
After confirming the Internet connection through the modem, connect the modem to the Internet port of the router; connect the computer to any of the four Ethernet ports at the back of the router. For instructions, click here.
Checking the Router's LEDs
After connecting the devices together, check the lights on the front panel of the router. Ensure that the Internet light, as well as numbered light corresponding to the Ethernet port where the computer is connected, is lit. For further instructions, click here.
Setting Up a Linksys Router for Cable Internet Connection

Step 1:
Access the router's web-based setup page. For instructions, click here.

NOTE: If you are using a Mac computer to access the router's web-based setup page, click here.

Step 2:
On the Setup tab, click the MAC Address Clone sub-tab.

Step 3:
Select Enabled then click Clone My PC's MAC.

Step 4:
Click Save Settings.

Step 5:
Click the Status tab.

Step 6:
Check the Internet IP Address. If the Internet IP Address has numbers, this means the router has been properly configured. You should now be able to access the Internet. If you're still unable to access the Internet, powercycle the modem, the router and then restart the computer.

NOTE: If the IP address is still 0.0.0.0, click IP Address Release then, click IP Address Renew. If this does not change the IP Address, powercycle the modem, the router and then restart the computer.

Are you looking for the wireless network key or password ?
Is there any computer online using the router.
If not then you will need to connect the computer to the router.
If yes then you can open the router set up page on that computer.
router set up page is the page where you can check all the router settings.
You will find the wireless network key or password on the set up page of the router.

Hello,

The cricket modem does not work as a network card in the standard sence.
It will only connect to the cricket 3g network.

There is no way to use the cricket 3g USB stick to connect to your linksys router.

You will need to get a second network card on this computer to connect to the network.

If your netbook already has a seperate wireless network card buit in, then use that to connect to the network.

Thank you,

Pat

You will need to check the wireless settings of the router .
Is there any computer connected to the router with the Ethernet cable?
If not then connect 1 computer to the router and open the router set up page. Once you open the router set up page, you will be able to find the wireless network key.
Use that password to connect to the wireless network

Click Here for step by step Instructions on how to find the network key

How is your router connected? If you have all port lights lit, either green or orange, and nothing connects seeing the Internet, are your problems with wireless access? Is the Wireless set correctly, by going to http://192.168.1.1 and logging in to the router? Make sure the SSID (network name) and other security measures are set correctly ... I prefer WPA-PSK[TKIP] for its simplicity. You will need the passcode you choose to log in with wireless devices.

please reset the router
configure the router type ip address on the browser
may be 192.168.1.1

press the reset button then the passcode will be set to the default, you can now just set up your wireless network via the wizard. lastly set up your router by entering your IP address in you web browsers address bar to bring up the router settings.

have you pushed the wireless activation button that will detect you wireless card in your laptop. make sure you do that and hopefully it will detect it

To connect to the router wirelessly using a Windows XP, right click on the wireless network connection icon on the lower right corner of the screen and choose view available wireless networks. Select your existing network and click on the connect button. If you are using Vista, go to network and sharing center of your control panel then select connect to a network. If you still having problems, please provide details of the problem like your Internet service provider and if there are already other computers online with your WRT54G2.